‘Untitled (equal equals equal) ’, 1990,
ballpoint pen on paper, 30 x 24 cm.
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‘Dix de chaque côté [Ten on both sides]’, 1992, ballpoint pen on paper, 30 x 24 cm.
‘Untitled (1=1, 11≠2)’, 1992, ballpoint pen on paper, 30 x 24 cm.
‘Untitled (ten 7, 8, 9)’, 1990, ballpoint pen on paper, 30 x 24 cm.